manage my time.>

I think that im just not managing the time so well , because sometimes i do everything in the last moment . sometime i don't know what to do first , or what homeworks do first , because i don't have control or a agenda with the time that i have to do . i think it will be better if i make an agenda or a calendar to organizes everything that i have to do in the week.. i think it will be more helpful for me and i will feel less stress body , mind and brain..